1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15e3e1e09c73792c1acc65bd7b2d837edd71768cb9be1f99a3d366af849271c. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1b64c78-64a7-4594-bd19-ce08585720d7.json and https://artists.proofprofile.net/proofs/artist/b1b64c78-64a7-4594-bd19-ce08585720d7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Natural Sound: Waldkonzert / Sylvan Concert
Natural Sound: Frühlingskonzert im Auwald / Spring Concert in Riverain Forest
Natural Sound: Vogelhochzeit / A Symphony of Birdsong
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4691cd2030c32480a1d7306fc5e662b14687f806f58e39b725f4b0e5a783b4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC449001384 — a six-check JSON result.
Natural Sound: Blaukehlchen / Bird of a Thousand Voices
Natural Sound: Waldesrauschen / Whispering Forest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ecf4f61e13fb732a66fb81ae833472a449201cb7e3aa34a1c7ea1b4491a90d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC449300001 — a six-check JSON result.
Natural Sound: Meistersinger / Master Singers
Natural Sound: Waldamsel / Forest Blackbird
Natural Sound: Winter am Bodensee / Winter at Lake Constance
Natural Sound: Bezaubernder Frühling / Fascinating Springtime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237eb7bd1c8154175e51c07446d79c80fcd050313bf49ab6795ec0960e4ba610. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC440106012 — a six-check JSON result.